Riffler creates unique, copyright-free guitar riffs instantly. There are a huge range of preset styles, whilst advanced users can explore a wide range of customization options to fine-tune their sound. Riffs can be exported as an audio* or MIDI file and, as Riffler is a VST* and AUv3* plugin, it can be used as a standalone app or inside a host DAW*.
*Not currently on Android.
The original Riffler was perfect for instantly making heavy, distorted, scale based riffs. Riffler Flow is a brand new app that instantly generates softer, clean, arpeggio based riffs at the press of a button. Perfect for rock, hip-hop, EDM and more, Riffler Flow includes the same great features as the original Riffler including audio and MIDI export and the ability be used as an AUv3 inside a host DAW.
: A pointer to the unique 64-bit identifier for the WNF state.
Developers and security researchers operating at the lowest levels of the Windows operating system frequently interact with ntdll.dll . As the primary user-mode bridge to the Windows kernel, ntdll.dll acts as the gatekeeper for system calls. Among its many undocumented and semi-documented native APIs, the Windows Notification Facility (WNF) functions—specifically NtQueryWnfStateData —play an essential role in system-wide event notifications.
: A dynamic tracker. On input, it tells the system how large your allocated buffer is. On output, it returns the true byte count written by the kernel.
: The buffer you provided is not large enough to hold the full state data.
: The Windows version is too old. NtQueryWnfStateData was introduced around Windows 10, but backports exist in Windows 7 SP1. ntquerywnfstatedata ntdlldll better
ntdll.dll (user mode) -> leads to NtQueryWnfStateData in ntoskrnl.exe (kernel mode). Signature:
All of these functions are exported from ntdll.dll and make system calls into the kernel’s ntoskrnl.exe , where the WNF subsystem resides.
Show you for specific system states.
// Example snippet (conceptual) WNF_STATE_NAME myWnfStateName = ... ; WNF_CHANGE_STAMP changeStamp; BYTE buffer[1024]; ULONG bufferSize = sizeof(buffer); NTSTATUS status = NtQueryWnfStateData( &myWnfStateName, NULL, NULL, &changeStamp, buffer, &bufferSize ); if (NT_SUCCESS(status)) // Process the data in buffer Use code with caution. Conclusion: A Powerful Tool for Modern Windows : A pointer to the unique 64-bit identifier
If you're looking for help with this, I can:
NTSYSCALLAPI NTSTATUS NTAPI NtQueryWnfStateData( _In_ PCWNF_STATE_NAME StateName, // 64-bit WNF State Name _In_opt_ PCWNF_TYPE_ID TypeId, // Optional Type GUID VOID *ExplicitScope, // Optional Scope _Out_ PWNF_CHANGE_STAMP ChangeStamp, // Current version/stamp of the data _Out_ PVOID Buffer, // Output buffer for data _Inout_ PULONG BufferSize // Buffer size (in/out) Use code with caution. Copied to clipboard GitHub - sbousseaden/injection-1 Key Use Cases System Monitoring
EXTERN_C NTSTATUS NTAPI NtQueryWnfStateData( _In_ PCOBJECT_ATTRIBUTES ObjectAttributes, _In_ PVOID StateName, // WNF State Name Identifier _In_opt_ PVOID ExplicitScope, _Out_ PULONG ChangeStamp, _Out_writes_bytes_to_opt_(*BufferLength, *BufferLength) PVOID Buffer, _Inout_ PULONG BufferLength ); Use code with caution. Why Optimizing Native APIs Makes ntdll.dll Better
The error "The procedure entry point NtQueryWnfStateData could not be located" usually highlights OS version gaps or system corruption. Among its many undocumented and semi-documented native APIs,
ntdll.dll (NT Layer DLL) is a user-mode system library loaded into almost every Windows process. It acts as the gateway to the Windows kernel, exporting the so-called Native API (NTAPI) functions — low-level system call stubs that transition execution from user mode to kernel mode. Examples include NtCreateFile , NtReadVirtualMemory , and the subject of this article: NtQueryWnfStateData .
This example demonstrates a complete query cycle, handling the optional TypeId and ExplicitScope parameters by setting them to nullptr . The raw stateBuffer is then interpreted according to the known mapping for this specific WNF state.
If you are an end-user experiencing this crash while launching a third-party app or game, use these proven system recovery steps to fix it: NtQueryWnfStateData in ntapi::ntexapi - Rust - Docs.rs
